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esp_adc: added adc digital filter feature

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This commit is contained in:
Armando
2023-02-07 16:01:26 +08:00
committed by Armando (Dou Yiwen)
parent 648b1a41c6
commit 3afa671069
38 changed files with 1032 additions and 402 deletions
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components/hal/esp32s2/include/hal/adc_ll.h
+22 -37
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@@ -357,10 +357,12 @@ static inline void adc_ll_digi_controller_clk_disable(void)
/**
* Reset adc digital controller filter.
*
* @param idx Filter index
* @param adc_n ADC unit.
*/
static inline void adc_ll_digi_filter_reset(adc_unit_t adc_n)
static inline void adc_ll_digi_filter_reset(adc_digi_iir_filter_t idx, adc_unit_t adc_n)
{
(void)idx;
if (adc_n == ADC_UNIT_1) {
APB_SARADC.filter_ctrl.adc1_filter_reset = 1;
APB_SARADC.filter_ctrl.adc1_filter_reset = 0;
@@ -371,20 +373,24 @@ static inline void adc_ll_digi_filter_reset(adc_unit_t adc_n)
}
/**
* Set adc digital controller filter factor.
* Set adc digital controller filter coeff.
*
* @param adc_n ADC unit.
* @param factor Expression: filter_data = (k-1)/k * last_data + new_data / k. Set values: (2, 4, 8, 16, 64).
* @param idx filter index
* @param adc_n adc unit
* @param channel adc channel
* @param coeff filter coeff
*/
static inline void adc_ll_digi_filter_set_factor(adc_unit_t adc_n, adc_digi_filter_mode_t factor)
static inline void adc_ll_digi_filter_set_factor(adc_digi_iir_filter_t idx, adc_unit_t adc_n, adc_channel_t channel, adc_digi_iir_filter_coeff_t coeff)
{
(void)idx;
(void)channel;
int mode = 0;
switch (factor) {
case ADC_DIGI_FILTER_IIR_2: mode = 2; break;
case ADC_DIGI_FILTER_IIR_4: mode = 4; break;
case ADC_DIGI_FILTER_IIR_8: mode = 8; break;
case ADC_DIGI_FILTER_IIR_16: mode = 16; break;
case ADC_DIGI_FILTER_IIR_64: mode = 64; break;
switch (coeff) {
case ADC_DIGI_IIR_FILTER_COEFF_2: mode = 2; break;
case ADC_DIGI_IIR_FILTER_COEFF_4: mode = 4; break;
case ADC_DIGI_IIR_FILTER_COEFF_8: mode = 8; break;
case ADC_DIGI_IIR_FILTER_COEFF_16: mode = 16; break;
case ADC_DIGI_IIR_FILTER_COEFF_64: mode = 64; break;
default: mode = 8; break;
}
if (adc_n == ADC_UNIT_1) {
@@ -394,39 +400,18 @@ static inline void adc_ll_digi_filter_set_factor(adc_unit_t adc_n, adc_digi_filt
}
}
/**
* Get adc digital controller filter factor.
*
* @param adc_n ADC unit.
* @param factor Expression: filter_data = (k-1)/k * last_data + new_data / k. Set values: (2, 4, 8, 16, 64).
*/
static inline void adc_ll_digi_filter_get_factor(adc_unit_t adc_n, adc_digi_filter_mode_t *factor)
{
int mode = 0;
if (adc_n == ADC_UNIT_1) {
mode = APB_SARADC.filter_ctrl.adc1_filter_factor;
} else { // adc_n == ADC_UNIT_2
mode = APB_SARADC.filter_ctrl.adc2_filter_factor;
}
switch (mode) {
case 2: *factor = ADC_DIGI_FILTER_IIR_2; break;
case 4: *factor = ADC_DIGI_FILTER_IIR_4; break;
case 8: *factor = ADC_DIGI_FILTER_IIR_8; break;
case 16: *factor = ADC_DIGI_FILTER_IIR_16; break;
case 64: *factor = ADC_DIGI_FILTER_IIR_64; break;
default: *factor = ADC_DIGI_FILTER_IIR_MAX; break;
}
}
/**
* Enable/disable adc digital controller filter.
* Filtering the ADC data to obtain smooth data at higher sampling rates.
*
* @note The filter will filter all the enabled channel data of the each ADC unit at the same time.
* @param adc_n ADC unit.
* @param idx Filter index
* @param adc_n ADC unit
* @param enable Enable / Disable
*/
static inline void adc_ll_digi_filter_enable(adc_unit_t adc_n, bool enable)
static inline void adc_ll_digi_filter_enable(adc_digi_iir_filter_t idx, adc_unit_t adc_n, bool enable)
{
(void)idx;
if (adc_n == ADC_UNIT_1) {
APB_SARADC.filter_ctrl.adc1_filter_en = enable;
} else { // adc_n == ADC_UNIT_2